Once upon a time, William Herrin <b...@herrin.us> said: > On Thu, Jul 26, 2018 at 12:58 PM, Jason Kuehl <jason.w.ku...@gmail.com> wrote: > > Science https://climate.nasa.gov/vital-signs/sea-level/ > > "The first graph tracks the change in sea level since 1993 as observed > by satellites." > > I *really* want to understand the technology that lets a satellite > hundreds of miles in the sky detect a 3mm change in average global sea > level between the start and end of the year with an error bar that > grows to only 4mm over a quarter of a century.
Well, you must not *really* want to understand, since there's a "Learn more" link to follow on the above page that (after a couple more clicks) would lead you to this page that has some explanation: https://www.aviso.altimetry.fr/en/techniques/altimetry.html -- Chris Adams <c...@cmadams.net>
